Show:
Continental Drift
Sea-Floor Spreading
Plate Tectonics
Plate Boundaries
Review
100
Name of super continent
Pangea
100
process by which oceanic crust forms along a mid-ocean ridge
sea-floor spreading
100
idea that Earth's surface is made of rigid slabs of rock that move with respect to each other
plate tectonics
100
Plate boundary that causes mid-ocean ridges and rift valleys (pull apart)
Divergent Boundary
100
rock formed from cooled molten material
igneous rock
200
Scientist who proposed this theory in 1910
Wegener
200
Scientist who proposed theory in 1960
Hess
200
scientist who proposed theory in 1968
Wilson
200
Plate boundary that collides together to form mountains and volcanoes
Convergent Boundary
200
rock formed under intense heat and pressure
Metamorphic rock
300
naturally preserved remains, imprints, or traces of organisms that lived long ago (also evidence that supports Continental Drift)
Fossils
300
Name of feature formed if continental crust is being pulled apart on land (opposite of a mid-ocean ridge)
rift valley
300
Layer of the Earth the plates "float" on
Mantle
300
Plate boundary that grind parallel to one another (San Andres Fault)
Transform boundary
300
the system that all rocks can transform and become different types of rock
Rock Cycle
400
Why Wegener's Theory was rejected
Could not explain force that moved, caused the plates to split apart
400
tool used to map the ocean floor
Sonar
400
3 type of plate boundaries
Convergent, Divergent, and Transform
400
Force that causes plate movement due to change in density of a fluid
Convection currents in the mantle
400
2 types of igneous rock and 2 differences
intrusive- formed below surface by cooling magma and with large crystals


extrusive- forms above surface by cooling lava and with small crystals

500
3 supporting pieces of evidence for the theory of Continental Drift
1. continents fit together like puzzle

2. age and composition of mountain range

3. like fossils on each continent

4. climate change

500
3 pieces of evidence to support sea-floor spreading
1. magnetic stripes on ocean floor

2. old rock far away from mid-ocean ridge

3. sediment build up away from ridge

4. thermal energy change away from ridge

500
2 pieces of evidence to support theory of Plate Tectonics
1. GPS allows actual measurements of plate movement

2. Seismic activity occurs at plate boundaries

500
2 layers of the Earth that make up the crust and the top layer of the mantle
Asthenosphere and Lithosphere 
500
All 4 steps in order to create sedimentary rock
erosion, deposition, compaction, and cementation